Accession Number : ADA305460

Title :   Committee on Tidal Hydraulics. Minutes of the Meeting (104th) Held in Sausalito, California on 18-20 April 1995.

Corporate Author : CORPS OF ENGINEERS SAN FRANCISCO CA SAN FRANCISCO DISTRICT

PDF Url : ADA305460

Report Date : 20 APR 1995

Pagination or Media Count : 28

Abstract : The U.S. Army Corps of Engineers Committee on Tidal Hydraulics (Cm) met in Sausalito, CA, on 18-20 April 1995 at the request of the San Francisco District. The San Francisco District briefed the Cm on two navigation projects: the proposed John F. Baldwin Phase m project, which will extend an enlarged San Francisco Bay navigation channel from near Richmond, CA, to Suisun Bay near Avon; and a possible later enlargement of the channel upstream to StocItton, CA. The effects of the John F. Baldwin Phase III Project on salinity intrusion are being evaluated using the San Francisco Bay-Delta physical model in Sausalito and a three- dimensional numerical model of the system. The San Francisco District posed questions for the Cm on the relative present and future roles of the physical and numerical models and how to resolve apparent differences in model salinity results. The Cm also heard of the completed numerical modeling performed for the District's Long-Term Management Strategy (LIMS) study to provide options for dredged material disposal in the San Francisco Bay area. A two-dimensional numerical model of sediment transport using the TABS-MD system of models, a three-dimensional numerical model of hydrodynamics, and a conservative tracer using the model RMA-10 were used to predict the fate of sediments placed in open water at several sites in the bay system. The New Orleans District made a special presentation to the Cm on the Bonnet Carre' Freshwater Diversion project near New Orleans, LA, which is intended to reduce the rate of marsh loss in the Lake Pontchartrain Basin and improve fisheries production by diverting Mississippi River water into the lake. Opponents of the project fear environmental damage to the basin. (AN)

Descriptors :   *SEDIMENT TRANSPORT, *HYDRAULICS, *HYDRODYNAMICS, *SAN FRANCISCO BAY, COMPUTER PROGRAMS, MATHEMATICAL MODELS, WATER FLOW, ENVIRONMENTAL IMPACT, TIDAL CURRENTS, FRESH WATER, NAVIGATION, ARMY CORPS OF ENGINEERS, ENVIRONMENTAL MANAGEMENT, WETLANDS, SALINITY, FISHERIES, MISSISSIPPI RIVER, LAKES, DREDGED MATERIALS, DREDGING, SEDIMENTS, CHANNELS(WATERWAYS), INTRUSION, WATER SUPPLIES, OCEAN BASINS, OPEN WATER, OCEAN TIDES.

Subject Categories : Hydrology, Limnology and Potamology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE